// Copyright 2014 The Oppia Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Controllers for the state parameter changes section
 * of the editor sidebar.
 *
 * @author sll@google.com (Sean Lip)
 */

oppia.controller('StateParamChangesEditor', [
    '$scope', 'editorContextService', 'changeListService', 'explorationStatesService',
    function($scope, editorContextService, changeListService, explorationStatesService) {

  $scope.$on('refreshStateEditor', function() {
    $scope.initStateParamChangesEditor();
  });

  $scope.initStateParamChangesEditor = function() {
    $scope.stateName = editorContextService.getActiveStateName();
    var stateData = explorationStatesService.getState($scope.stateName);
    $scope.stateParamChanges = stateData.param_changes || [];
  };

  $scope.saveStateParamChanges = function(newValue, oldValue) {
    if (!angular.equals(newValue, oldValue)) {
      changeListService.editStateProperty(
        editorContextService.getActiveStateName(), 'param_changes',
        newValue, oldValue);

      var _stateData = explorationStatesService.getState(
        editorContextService.getActiveStateName());
      _stateData.param_changes = angular.copy(newValue);
      explorationStatesService.setState(
        editorContextService.getActiveStateName(), _stateData);
    }
  };
}]);
